We run a few workflows that schedule other workflows to run in the future up to 30 days. Sometimes those workflows will fail to run and if you click to edit them they say
"task startup user's credentials must be provided. use the change startup user dialog to do this."
these tasks are all added the same way with the same workflow and im not sure what causes only some to fail. if you update the credentials they all work fine.
fom logs:
2014-07-07 12:30:00.113-0400 [Thread-64] WARN {} [WorkflowResumeProcessor] User session fix disabled
2014-07-07 12:30:00.113-0400 [Thread-64] ERROR {} [WorkflowRuntimeServiceImpl] Can't execute workflow, no user token
2014-07-07 12:30:00.113-0400 [Thread-64] WARN {} [TaskRunner] Unable to execute workflow from task
ch.dunes.util.DunesServerException: Can't execute workflow, no user token